Mosasaurus (Leiodon) anceps (Owen, 1851)

Remarks

• Collection of:    Maarten Haverkamp

• Formation:       Maastrichtian rocks (formation ?)

• Location:          Morocco

General Info

Synonyms (general list of reports-not an exhaustive list!)

• 1841 Leiodon Owen

• 1851 Leiodon anceps Owen

• 1925 Liodon anceps Owen; Depéret & Russo

• 1925 Dyrosaurus phosphaticus sp. Depéret & Russo

• 1935 Leiodon anceps Owen; Arambourg

• 1952 Mosasaurus (Leiodon)cfr. anceps (Owen); Arambourg

• 1967 Liodon anceps Owen; Russell

• 2003 "Mosasaurus (Leiodon) cfr. anceps sensu Arambourg (1952); Machalski et al.

Stratigraphic Occurrence

• Very Late Maastrichtian beds of Morocco

• Very Late Maastrichtian rocks of Poland

• Late Campanian rocks of England

• Late Campanian rocks of Sweden

• Late Campanian rocks of France

Age

• In Poland, Mosasaurus (Leiodon) anceps (Owen)occurs in the Belemnella kazimiroviensis Zone, very Late Maastrichtian Stage (65 mya). 

• The Moroccan material is very Late Maastrichtian in age as well.

• In England, France and Sweden, the species is reported from very Late Campanian sediments.  The holotype is from England.

Geographic Occurrence (not an all-inclusive list)

• England

• France

• Morocco

• Poland

• Sweden

Remarks

       For more information, see:

• Arambourg, C.  1952.  Les Vértebrés Fossiles des Gisements de Phoshates (Maroc-Algérie-Tunisie).  Notes et Mémoires du Division of Mines and Geology, French Morocco 92, 279–282; plate 38, fig's 1–11 and plate 39, fig's 8–11.

• Machalski, M.; Jagt, J. W. M.; Dortangs, R. W.; Mulder, E. W. A.; Radwański, A.  2003.  Campanian and Maastrichtian Mosasaurid Reptiles from Central Poland.  Acta Palaeontologia Polonica 48 (3), 404–405, fig. 8.